Foot spa



FIG. 1 is a right side perspective view of a foot spa showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is top plan view thereof; and,

FIG. 7 is bottom plan view thereof. 

The ornamental design for a foot spa, as shown and described. 